Microbryum davallianum
Bull. Buffalo Soc. Nat. Sci. 32: 240. 1993,.
Basionym: Gymnostomum davallianum Smith Ann. Bot. (König & Sims) 1: 577. 1805
Synonyms: Pottia davalliana (Smith) C. Jensen
Distal laminal cells weakly convex superficially, adaxial surface of costa not mammillose. Seta elongate. Capsule cylindrical, stegocarpous but never cleistocarpous. Spores granulose, low-papillose or spiculose, large, 28–39 µm.
Distribution
North America, Mexico, Europe, sw Asia, Africa, Pacific Islands (New Zealand)
Discussion
Varieties 3 (3 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Capsules commonly wide-mouthed when dehisced, with a single row of thickened cells below mouth, peristome absent, spores spiculose, 31-39 µm. | Microbryum davallianum var. davallianum |
| 1 | Capsules narrow mouthed when dehisced, with usually 2 or more rows of thickened cells below mouth, peristome variously absent or present, spores merely papillose, 27-34 µm | > 2 |
| 2 | Peristome well developed | Microbryum davallianum var. commutatum |
| 2 | Peristome rudimentary or absent | Microbryum davallianum var. conicum |
... more about "Microbryum davallianum"
absent +
differentiated +
absent +
absent +
not mammillose +
revoluble +
persistent +
absent +
of 1;2 rows +
acute +
absent +
differentiated +
usually slightly wider +
trabeculate +
absent +
usually ovate;oblong +
not differentiated +
obovoid +
papillose +
cylindrical +
specialized +
absent +
bulging +
convex +
thickened +
thin +
brownish +
absent +
2-stratose +
stacked +
9mm;16mm +
recurved +
1-stratose +
rhomboidal;shortrectangular;quadrate;hexagonal +
spiculose +
filiform +
central +
differentiated +
multicellular +
absent +
common +
asexual +
absent +
absent +
enlarged +
differentiated +
contorted +
appressed +
spreading +
concave;keeled;channeled;ovoid;lanceolate or lingulate +
ligulate +
appressed +
fragile +
spreading +
occasionally less papillose and somewhat thicker walled +
recurved +
papillose +
plane +
involute +
thicker +
absent +
low-conic +
photosynthetic +
tall +
absent +
sheathing +
long-oval +
usually larger +
ligulate +
irregular +
untwisted +
absent +
rudimentary +
triangular +
differentiated +
not differentiated +
Bull. Buffalo Soc. Nat. Sci. +
straight +
oblique +
1;2 +
absent +
differentiated +
twisted +
elongate +
spiculose +
granulose +
large +
branching +
sheathing +
Microbryum davallianum +
Microbryum +
species +
apiculate +
ovate;short elliptical +
reflexed +
low +
higher +
1;2;4 +
rectangular +
thin +
bulbiform +
scattered +
brown;reddish-brown +
occasionally smaller than the perichaetiate +